<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
<style>
    ul{
        list-style: none;
    }
    *{
        margin: 0;
        padding: 0;
    }
    ul{
        margin: 10px auto;
        width: 600px;
        height: 400px;
        border: 5px solid gray;
        position: relative;
    }
    ul li{
         position:absolute;
         width: 60px;
         height: 200px;
         left: 50%;
         margin-left: -30px;
         bottom: 30px;
         text-align: center;
         transform-origin: bottom center;
         border-radius: 10px;
         transition: all 2s;
         /*调整中心点*/
    }
    ul li:not(:nth-child(7)){
        opacity: 0;
    }
    ul:hover li{
        opacity:1;
    }
    ul:hover li:nth-child(1),ul li:nth-child(13){
        background: purple;
    }
    ul:hover li:nth-child(2),ul li:nth-child(12){
        background: darkblue;
    }
    ul:hover li:nth-child(3),ul li:nth-child(11){
        background: deeppink;
    }
    ul:hover li:nth-child(4),ul li:nth-child(10){
        background: deepskyblue;
    }
    ul:hover li:nth-child(5),ul li:nth-child(9){
        background: green;
    } 
    ul:hover li:nth-child(6),ul li:nth-child(8){
        background: yellow;
    }
    ul li:nth-child(7){ 
        background: red;
    }
    ul:hover li:nth-child(1){
        transform: rotate(90deg);
    }
    ul:hover li:nth-child(13){
        transform: rotate(-90deg);
    }
    ul:hover li:nth-child(2){
        transform: rotate(75deg);
    }
    ul:hover li:nth-child(12){
        transform: rotate(-75deg);
    }
    ul:hover li:nth-child(3){
        transform: rotate(60deg);
    }
    ul:hover li:nth-child(11){
        transform: rotate(-60deg);
    }
    ul:hover li:nth-child(4){
        transform: rotate(45deg);
    }   
    ul:hover li:nth-child(10){
        transform: rotate(-45deg);
    }
    ul:hover li:nth-child(5){
        transform: rotate(30deg);
    }
    ul:hover li:nth-child(9){
        transform: rotate(-30deg);
    }
    ul:hover li:nth-child(6){
        transform: rotate(15deg);
    }
    ul:hover li:nth-child(8){
        transform: rotate(-15deg);
    }
</style>
</head>
<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
        <li>6</li>
        <li>7</li>
        <li>8</li>
        <li>9</li>
        <li>10</li>
        <li>11</li>
        <li>12</li>
        <li>13</li>
    </ul>
</body>
</html>